You're entering text but you realize you've made a mistake a couple of lines back. You either fumble about with your finger trying to get back to the exact place, or you use the magnifying glass.
Touch and hold your finger in the right area and the magnifying glass appears, enabling
you to fine tune your insertion point.
"iPad Tips and Tricks : Use the magnifying glass"
Reference : top-ipad-video-converter.com
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